Base-burning steam-boiler



(No Model.)

M. E. HERBERT.

BASE BURNING STEAM BOILBR. No. 301,366. Patented July 1.1884.

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MIGHEAL HERBERT, OF ST. JOSEPH, MISSOURI.

BASEHBURNENG STEAMIHBOBLER.

SPECIFICATJON forming part of Letters Patent No. 301,366, dated July 1, 1884.-.

Application tiled March 1Q, 1884.

To all who/n it 'nm/y conccra- Be it known that I, Mionnir. E. lliminiu'r, a citizen of the United States, residing at St. Joseph, in the county ot` Buchanan and State of Missouri, have invented certain new and useful .Improvements in Base-Burning Steam- Boilers, of which the following is a description.

The figure isa vertical central section.

The object of my invention is to provide a goed base'burning steam-boiler which shall not be complicated by a great number of lines, but which shall still have a great extent of heating-surface.

It consists, mainly, in an upright boiler hav4 ing at its lower side a downwardly-proiecting annular chamber at its outer periphery, and another' similar annular chamber at the point where it encompasses the i'uel-mz'igazine, in combination with a separate annular chamber set between the annular chambers of the boiler proper, and connected to them by cir` culatingpipes, which separate annular chamber also forms the iirc-pot, from which the smoke and products ot' combustion pass upwardly between theinner annular chamber of theboiler proper and the separate annular chamber, and thence over the separate annular chamber and down between it and the outer annular chamber of the boiler proper, thence underneath the lower edge of the latter and up between its exterior surface and an inclosing brick wall or casing, as hereinafter more fully described.

In the drawing, A represents the tire-pot grate, supported upon brick-work above the ash-pit L.

B is the boiler proper, which is of the upright type, and at its lower end is l'ormed with two annular hot-water chambers, 4l/ and B2, one oi' which, B', surrounds the fuel-magazine H and extends down to` the lower end of the same', and the other of which extends downwardly from the outer periphery of the boiler, the two annular chambers being connected at the top by the crown-sheet lo.

C is the separate annular chamber, which is supported upon the brick foundation and extends up between the annular chambers B B2 is the boiler proper, but stops short ofthe erownsheet E. This annularchamber C i s connected (No model.)

by horizontal pipes K with the inner chamber, IS, ot' the boiler', and is connected with the outer chamber, 32, by the external elbowed pipes, M, which pipes permit a free circula! tion of water through the chamber C.

D is an outer casing or brick Wall,which surrounds thc boiler, leaving a space between it and the boiler i'or the escape of the smoke as it passes to the smoke-pipe E.

ll is a steam-pipe for carrying the steam generated in the boiler tothe desired point ol utiliza-tion.

vVith the construction thus described the flames and products ol" combustion pass up iirst between the annular chambers B and C, acting` upon their walls and the pipes K, then turn over the'top ot' chamber C, acting upon the crownsheet l, then, passing downwardly between the chambers C and 152, act upon their adjacent surfaces,` then turn beneath the.

chamber 132 and pass upwardly between the same and the brick wall, and pass out at the smokepipe E, thus atl'ording a tortuous passage to the iiames and a great exposure of boilerssuri'ace, which secures very high steaming'capacity without the use of a complicated system of tubes.

Having thus described my invention, what I claim as new is l. A base-burning steam-boiler having a central fuel-inagazine through it, extending to and attached to the top of the boiler, with a down wardly-pro] ectin g annular water-cham ber, B, around it, and a pendent annular water-chamber, B, at its outer periphery, in combination with the separate annular Waterchamber C', interposed between the chambers B and Bi, and connected with the same by circulating-pipes, substantially as shown and described.

2. The combination ot boiler B, having central magazine, H, and annular downward ly-projecting chambers '3' B2, the separate annular chamber C, with pipes K and M, and the brick wall or casing D, as and for the purpose described.

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